Warning: include(/usr/share/mediawiki-extensions/base/ExtensionFunctions.php): failed to open stream: No such file or directory in /etc/mediawiki-extensions/extensions.php on line 4

Warning: include(): Failed opening '/usr/share/mediawiki-extensions/base/ExtensionFunctions.php' for inclusion (include_path='/usr/share/mediawiki:/usr/share/mediawiki/includes:/usr/share/mediawiki/languages:/usr/share/mediawiki/vendor/pear/pear_exception:/usr/share/mediawiki/vendor/pear/console_getopt:/usr/share/mediawiki/vendor/pear/pear-core-minimal/src:/usr/share/mediawiki/vendor/pear/mail_mime:/usr/share/mediawiki/vendor/pear/mail_mime-decode:/usr/share/mediawiki/vendor/pear/net_socket:/usr/share/mediawiki/vendor/pear/net_smtp:/usr/share/mediawiki/vendor/pear/mail:.:/usr/share/php:/usr/share/pear') in /etc/mediawiki-extensions/extensions.php on line 4

Warning: require_once(/usr/share/mediawiki/extensions/Renameuser/SpecialRenameuser.php): failed to open stream: No such file or directory in /etc/mediawiki/LocalSettings.php on line 126

Fatal error: require_once(): Failed opening required '/usr/share/mediawiki/extensions/Renameuser/SpecialRenameuser.php' (include_path='/usr/share/mediawiki:/usr/share/mediawiki/includes:/usr/share/mediawiki/languages:/usr/share/mediawiki/vendor/pear/pear_exception:/usr/share/mediawiki/vendor/pear/console_getopt:/usr/share/mediawiki/vendor/pear/pear-core-minimal/src:/usr/share/mediawiki/vendor/pear/mail_mime:/usr/share/mediawiki/vendor/pear/mail_mime-decode:/usr/share/mediawiki/vendor/pear/net_socket:/usr/share/mediawiki/vendor/pear/net_smtp:/usr/share/mediawiki/vendor/pear/mail:.:/usr/share/php:/usr/share/pear') in /etc/mediawiki/LocalSettings.php on line 126